Air conditioning system



Dec. 19, 1939.

S. M. ANDERSON AIR CONDITIONING SYSTEM Filed Oct. 1, 1937 2 Sheets-Sheet1 BY o:

ATTORNEY.

19, 1939. s ANDERSON 2,184,110

' AIR CONDITIONING SYSTEM Filed Oct. 1, 1937 ZSheets-Sheet 2 EP a4INVENTOR. SRMUEL. M fllvasesow ATTORNEY.

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atented cc. 1, W39

QJSQJN l CONDITIUNING SYSTEM Samuel M. Anderson, Sharon, Mass, assignorto B. F. Sturtevant Company, Boston, Mass.

Application flctober 1,

2 Claims.

This invention relates to ventilators and relates more particularly toventilators which may be used in air conditioned passenger vehicles.

Ventilators are used in railway passenger cars for exhausting. whatmight be called used air from the cars. This invention provides exhaustventilators which incorporate the following features: The larger volumesof air resulting from evaporative cooling and from pressure ventilatingare provided for. The ventilators include balanced dampers which preventoutside air from entering the car through the ventilators and whichadjust themselves to pass out any volume of indoor air. They areadaptable to late designs of rounded roofs. They include means forpreventing rain water from entering the car. They may be used toventilate the space between the car ceiling with cooler air from thepassenger space. ()utlets in the car ceiling communicate with thedampers and contain adjustable dampers.

An object of the invention is to provide an improved exhaust ventilatorfor railway passenger cars.

Other objects of the invention will be apparent from the followingdescription taken together with the drawings.

The invention will now be described with reference to the drawings, ofwhich:

Fig. 1 is a plan view looking upwardly, with a portion in section, atthe ceiling of a railway passenger car embodying the present invention;

Fig. 2 is a sectional view along the lines 2-4 of Fig. 1;

Fig. 3 is a view looking from the outside of the balanced dampers ofFig. 2;

Fig. 4 is a sectional view along the lines #4 of Fig. 3;.

Fig. 5 is an end view with a portion in section of the eliminatcrs ofFig. 2, and

Fig. 6 is a plan view looking upwardly upon the eliminator of Fig. 5.

Referring first to Fig. l which illustrates the lay-out of a completeair conditioning system embodying this invention, the blowers it drawfresh air through the vestibule inlet ii and re circulated air throughthe inlet it, pass it over the coils l3 and it and then force it intothe longitudinal duct i5.

As shown by Fig-2, the duct I5 is mounted between the ceiling id androof ll of the car and has the outlets it which extend through theceiling it to discharge the air into the lower duct is from which it isdischarged through the outlets it into the passenger space.

1937, Serial No. 166,805 (Ci. 98-19) Cold air from the passenger spacepasses upwardly through the grilles 2i mounted in the ceiling it, pastthe dampers 22 having hand operated handles 39, into the passages 23which extend between the walls id and 25 through the 5 mod ll of thecar.

The curved hoods 26 extend over the passages v 23 and down over the roofof the car and form with the bottom plates 27, the passages 28 whichextend into the atmosphere. The outer end of each hood is turned up toprovide the'gutter 313. The plates 2i are in recesses below the roofline ill and terminate at their inner ends at the walls 2t and areslanted downwardly to provide drainage for the passages 28.

In the passages 2d are mounted substantially vertical frames it whichcontain the plurality of superimposed dampers 38 which are pivoted at 29and which over-lap to close oh the passages 28. Each set of dampers 33is mounted along a I line tilted towards the center of the car as shownby Fig. 2 so that the weight of the dampers tends to maintain themclosed. The dampers 38 are so adjusted that the air through the passages23, when the blowers it are operating, move the dampers towards openposition to permil; the escape of this air. Air tending to enter the caras under wind pressure, through the passage 28 automatically closes thedampers 38.

In the outer portions of the passages 38 are 30 mounted the eliminatorsii, the details of which are shown by Figs. 5 and 6. These eliminatorscontain the plurality of upwardly extending, zigzag plates 32 providedwith hooks 33, which catch entrained water such as rain water at- 35tempting to enter the car, which water drains down the eliminator platesonto the plate 21 and thence from the car.

Normally in the heating season only five hundred cubic feet of air perminute will be discharged from the car and as the exhaust ventilatorsare designed to exhaust much larger volumes of air, the plates 3% (Figs.5- and 6) are provided to be mounted on the back sides of theeliminators 3! for plugging up substantially two-thirds of the airoutlet area.

In the cooling season, an air washer may be employed for evaporativecooling, in which case all outside'air and no recirculated air would bepassed through the system, in which case several times as much air willbe exhausted from the exhaust ventilators as during the heating season.The plates 3% are removed and the dampers it automatically adjustthemselves for the greatly increased air volume.

Likewise, the exhaust ventilators oi the invention may be used inpressure ventilation systems in which relatively large volumes of airare exhausted from the car.

It may be desired to have the cool exhaust air from the passenger space,cool the space between the ceiling l6 and roof I1, and cool the duct itby passing over and around it, in which case the walls 24 and 25 may beomitted. While one embodiment of the invention has been described forthe purpose of illustration, it should be understood that the inventionis not limited to the exact apparatus and arrangement of apparatusdescribed, as many departures therefrom may suggest themselves to thoseskilled in the art without departing from the spirit of the invention.

What is claimed is: a g 1. An exhaust air ventilator for a railwaypassenger car having a roof and having an opening in the roof to oneside of the center thereof for the exhaust of air from said car,comprising a curved hood having one'end terminating at said roofadjacent the inner edge of said opening, said hood extending over saidroof down along same towards the side of said car nearest said openingand having its other end, spaced from said root to form an air outlet tothe atmosphere, and a substantially flat member having one endterminating adjacent the outer edge of said opening and having its otherend at a lower level, said member extending under-. neath said hood andforming with same, an exhaust air passage above said roof, said otherend of said hood being turned upwardly to form a gutter.

2. An exhaust air ventilator for a railway passenger car having a roofand having an opening in the root to one side of the center thereof forthe exhaust of air from said car, comprising a curved hood having oneend terminating at said roof adjacent the inner edge of said opening,said hood extending over said roof down along same towards the side ofthe car nearest said opening and forming at its other end an exhaustoutlet above said roof, and means forming an upwardly curved gutter onthe upper edge of said other end of said hood.

SAMUEL M. ANDERSON.

